zulip/frontend_tests/node_tests/schema.js

zrequire("schema");

run_test("basics", () => {
    assert.equal(schema.check_string("x", "fred"), undefined);
    assert.equal(schema.check_string("x", [1, 2]), "x is not a string");

    const fields = {
        foo: schema.check_string,
        bar: schema.check_string,
    };

    const check_rec = (val) => schema.check_record("my_rec", val, fields);

    assert.equal(check_rec({foo: "apple", bar: "banana"}), undefined);

    assert.equal(check_rec("bogus"), "my_rec is not a record");

    assert.equal(check_rec({foo: "apple"}), "in my_rec bar is missing");

    assert.equal(check_rec({}), "in my_rec bar is missing, foo is missing");

    assert.equal(check_rec({foo: "apple", bar: 42}), "in my_rec bar is not a string");

    const check_array = (val) => schema.check_array("lst", val, schema.check_string);

    assert.equal(check_array(["foo", "bar"]), undefined);

    assert.equal(check_array("foo"), "lst is not an array");

    assert.equal(check_array(["foo", 3]), "in lst we found an item where item is not a string");
});